Pipe-stove for heating the blast for blast-furnaces.



PATENTBD. MAY 19, 1903.

E. 1 DAVIS. PIPE STOVE FOR HEATING THE BLAST FOR BLAST FURNACES APPLICATION FILED NOV. 7, 1902 3 SHEETS-SHEET 1.

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No. 728,377. l PATENTED MAY 19, 1903.

E. P. DAVIS. PIPE STOVEFOR HEATING THEBLAST FOR BLAST FURNACES.

APPLICATION FILED NOV. 7. 1902.

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N0. 7'2s,s77. PATENTED MA'Y19 ,190-3 B. P. DAVIS. PIPE STOVE FOR' HEATING THE BLAST FOR'BLAST FURNAGBS.

APPLICATION PI'LED NOV. 7, 1002.

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UNI-TED STATES Patented May 19, 1903.

PATENT OFFICE.

EDWARD PROSSER DAVIS, 5 OF ILKESTON, ENGLAND.

srnorr'rcn'rron forming part of Letters Patent No. 728,377, dated May 19, 1903.

Application filed November 7, 1902. Serial No. l30,404. (No model.)

T aZZ whom it may concern:

Be it known that LEDWARDPRQSSER DAVIS,

of Great Britain and Ireland and of the British Dominions beyond the Seas, Emperor of India, residing at Bennerley Furnaces, Ilkeston, in the county of Nottingham, England, have invented certain new and useful Improvements in Pipe-Stoves for Heating the Blast for Blast-Furnaces, of which the following is a specification.

This invention consists of the herein-described improvements in pipe-stoves for heating the blast for blast-furnaces. Heretofore the pipes in the stove, through which pipes the blast passes, have usually been made of cast-iron and arranged to stand up on end, carrying their own weight; but when so made it is obvious that the temperature of the stove is limited, for if a certain temperature is exceeded the pipes are liable to become distorted or damaged.

The objects of my invention are to so construct the stove that the pipes of the stove which heat the blast can be heated to a higher temperature than heretofore without fear of distorting or damaging the pipes, and also to so arrange the pipes and the mains to which they are fixed that the joints of the pipes to the mains can be made from outside the stove instead of from the inside, as at present, thus facilitating the repairs of the stove. The cost of manufacture of a pipe-stove of a certain heating capacity made in accordance with this invention is considerably less than apipestove of the same capacity made in the usual way.

On the accompanying drawings, Figure 1 is a sectional front elevation on line A A of Fig. 3 of a pipe-stove constructed in accordance with this invention. Fig. 2 is a sectional side elevation of the same, taken on line B B of Fig. 1. Fig. 3 is a sectional plan of the same on line C O of Fig. 1. Fig. 4 is a sectional elevation on an enlarged scale of one of the mains and the upper ends of the pipes, showing how the pipes are secured thereto.

The same letters of reference indicate the same parts in all the figures.

at is the stove or chamber in which the pipes through which the blast passes are situated.

b is the gas-inlet to the stove for heating the same, and 0 represents the sight-holes.

d is the outlet for the wasteheat.

e is the blast-inlet to the pipes in the stove, and f is the outlet therefrom tothe blast-fun nace.

In carrying out this invention I employ wrought-iron or steel pipes (marked g andh) preferably solid drawn in place of the usual cast-iron units or pipes heretofore employed in the said pipe-stoves, and each of these pipes g and his bent into the shape of the letter U and suspended in the stove a from the blast mains or boxes 'ij is Z, situated outside and on the top of the stove, the upper ends of the pipes g being fixed in the bottoms of the mains or boxes iand j and the upper ends of the pipes h in the bottom of the mains or boxes Zr: and Z. The blast entering at the inlet 6 into the box'i passes down the vertical limbs of the pipes g, depending from the bottom of the same, and then rises up the other limbs of these pipes 9 into the chamber j, and from thence by the short pipes m n to the chamber Z0 and down through the vertical limbs of the U-shaped pipes h, which are fixed thereto, and then around and up the other vertical limbs of these pipes h to the chamber Z, and from thence through the pipe f to the blast-furnace, the blast being heated by passing through the U shaped pipes g h in the furnace or chamber a.

In the stove illustrated on my drawings there are eleven of the pipes g and the same number of the pipes h; but it is to be understood that I do not limit myself to any par-' or boxes 'ij is Z are bypreference made of the IOO side the stove, and any of the pipes g It can readily be removed and replaced when required. Various means may be employed. for fixing the ends of the U-shaped pipes g h in the bottoms of the mains or boxes; but such means form no'part of my invention. A method which I have found to answer well in practice is shown on my drawings and ill ustrated on a larger scale by Fig. 4. This con.- sists in forming a recess 3 around each hole in the bottom of the box, in which the end of the U-shaped pipe fits, and filling in this recess with eastdron cement, a set pin or peg, such as i, being fixed in the projecting end of the pipe inside the box to take the weight of the pipe.

What I claim as my invention, and desire to secure by Letters Patent, is-- 1. A pipe-stove for heating the blast for blast-fnrnaces,provided with U-shaped iron covers and so arranged that the joints of the pipes in the boxes orchambers are made outside the stove, substantially as set forth.

In witness whereof I have hereunto set my hand in presence of two witnesses.

EDWARD PROSSER DAVIS.

Witnesses:

ROBERT ELLERAY, ARTHUR WILLIAM SIMPSON. 

